Yes, there is a FCI or some other publication regarding this, can't actually pinpoint it. No crewbunk away from the cockpit is accepted. There has to be a seat right behind the cockpit, either 1F or 2C seats.
I'll try to find the instruction, others might confirm this, as it makes ample sense. At least we should enforce this, i certainly will.
I'll try to enquire with GCAA.